# Resetting NHTSA's Fuel Economy Program: Commercial Medium- and Heavy-Duty On-Highway Vehicles and Work Trucks

**Action Urgency Score:** 30/100

| Field | Value |
|---|---|
| Agency | Transportation Department; National Highway Traffic Safety Administration |
| Type | Final rule |
| Action | Interpretive rule. |
| Published | 2026-08-31 |
| Significant | No |
| CFR parts | 49 CFR 523, 49 CFR 534, 49 CFR 535 |
| Summary | The National Highway Traffic Safety Administration is issuing this interpretive rule regarding the scope of its authority to set fuel economy standards for commercial medium- and heavy-duty on-highway vehicles and work trucks. This rule describes NHTSA's authority to set vehicle standards, which does not include the authority to set separate standards for engines. NHTSA will review its existing standards applicable to commercial medium- and heavy-duty on-highway vehicles and work trucks for consistency with this interpretation in a separate rulemaking. Pending the rulemaking process, NHTSA wil |
| Document number | 2026-17756 |

## Why this score
- Final rule.

Source: Federal Register API (Office of the Federal Register) (https://www.federalregister.gov/documents/2026/08/31/2026-17756/resetting-nhtsas-fuel-economy-program-commercial-medium--and-heavy-duty-on-highway-vehicles-and-work). Last refreshed: 2026-11-04T21:40:49.974Z.
Data from the Federal Register API; the published Federal Register document is authoritative. Informational only, not legal advice.